Demonstrators took to streets on Tuesday in several Yemeni cities, marking the anniversary of Taiz's massacre in which dozens of protesters were killed.
On May 29 of the last year, Taiz security forces led by the former security chief of Taiz Abdullah Qairan attacked the central protest camp in Taiz city, shooting demonstrators and setting their tents on fire. More than 50 people were killed.
According to protesters, they will hold protests, marches and rallies for a week, pointing out that the interim government, President Abdu Rabo Mansour Hadi and the Supreme Council of Judiciary turn a blind eye to the casualties fallen in Taiz by forces of the former president Ali Abdullah Saleh.
In Sana'a, protesters demanded the government to swiftly arrest those responsible officials of " Taiz Holocaust" and bring them to justice.
Taiz has been a source of pro-democracy uprising that ended Saleh's 33-year rule. Security forces often responded with deadly force.
Qairan, the main suspect of committing Taiz's crime, was dismissed after the election of President Abdu Rabo Mansour Hadi.
However, with help of Saleh's family, Qairan managed escape to Cairo after his dismal, media sources said.
Protests appealed to the Egyptian authorities to arrest Qairan on charges of committing brutal crimes in Taiz and Aden.
They demanded the Egyptian authorities to hold Qairan and surrender him or prosecute him according to the international law.
A court in Aden governorate had issued an arrest warrant against Qairan on charges of causing the death of a prisoner, Ahmed Darwish.
Qairan had admitted, in an interview with New York Times, that his forces committed mistakes, killed civilians and peaceful protesters.